The core tale of per­sonal redemp­tion is stan­dard stuff but Zak Hilditch’s bat­shit-crazy thriller tears through or­gies, mass sui­cides and mur­der­ous ram­pages to con­clude on a scene as mov­ing and ter­ri­fy­ing as the cli­max of Me­lan­cho­lia. Hold on tight. Jamie Gra­ham